Construction machinery with learning function includes an operating part having a working part, a manipulating part, a work-state detecting part, an operation-state detecting part, a reaction detecting part, a learning data memory configured to store a command outputted from the manipulating part in a time series as command data, and store, in a time series as estimation basic data, work-state data, operation-state data, and reaction data, a learning module configured to execute machine learning of command data stored in the learning data memory by using estimation basic data stored in the learning data memory, and, after the machine learning, receive an input of the estimation basic data during the operation of the operating part, and output an estimated command of the command, and a hydraulic drive system configured to drive the operating part based on one of the command and the estimated command, or both of the command and the estimated command.